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Re: pcp+graphite, take 2

To: Ken McDonell <kenj@xxxxxxxxxxxxxxxx>
Subject: Re: pcp+graphite, take 2
From: fche@xxxxxxxxxx (Frank Ch. Eigler)
Date: Mon, 16 Jun 2014 19:45:31 -0400
Cc: pcp@xxxxxxxxxxx
Delivered-to: pcp@xxxxxxxxxxx
In-reply-to: <539F7D13.8060407@xxxxxxxxxxxxxxxx> (Ken McDonell's message of "Tue, 17 Jun 2014 09:26:11 +1000")
References: <20140616214301.GB6693@xxxxxxxxxx> <539F7D13.8060407@xxxxxxxxxxxxxxxx>
User-agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.4 (gnu/linux)
Hi, Ken -

> Aside from advertising my bug (!) this looks really cool ... well done.

Thanks!  I thought the bug angle was neat because how clearly the
pretty graphs showed the problem. :-)

> On the instructions, I think you need "cd src; make" not "make pmwebd"
> ... the pmwebd make alone fails in an otherwise new and configured
> source tree.

Yeah, those were meant as colloquial instructions.

> [...] And the -A option appears to need a directory argument for a
> family of temporally related archives from the same host, like
> /var/log/pcp/pmlogger/$(hostname) ...

Not necessarily just the same host.  You can give it a parent
directory, and it'll let you navigate to subdirectories=hosts of your
choice and put them on graphs individually or together (to
contrast/relate different hosts).  Many of the graphite guis support
wildcards, so * for the first component means "all archives".

Once we have that partial-grand-unification widget that glues archives
in a directory together, this will be even tighter.  (A complication
that code will need to consider is [1].)
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1109539


> [...] For Graphite, I need to learn how to drive it, as the display
> shows nothing.

You need to expand the graphite-namespaced metric tree under the
"Graphite" icon on the left pane.  You navigate down to metrics to
toggle their inclusion on the "composer" window.  Tweak the "date
range" / "recent data" buttons on the top of the composer window to 
include the time range.


> Now back to http://oss.sgi.com/bugzilla/show_bug.cgi?id=1057

Thanks!


- FChE

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